Possible causes:
-HMI block replaced by and HMI block configuration on a drive with a different HP ratings.
-The current parameter of the customers parameter is inconsistent.

Remedy: Try resetting the drive back to a factory default by going into the
ConF menu enter
FCS menu enter
change FCS menu to InI and hold for 2 seconds.
Now power cycle the drive.
If the fault clears now try and reprogram the drive. If you are still getting the CFF fault you will need to replace the drive.